Clack or flap valve.



M. P. GUTERMUTH. CLACK OR FLAP VALVE. APPLIGATION FILED SEPT. 27, 1907.

Patented Feb. 15, 1910.

I I I I I I II I I- B I I I I I I I I L; I I I I I/ I I I I I I I I l A- I I I I I I I I I I I I I I I I I I I I I L I I I I I I I I I I II-\ I I e III I I I I Witnesses: Inventor; OLQIWW MAX FR EDRICH GUTERMUTH v UNITED STATES PATENT OFFICE.

MAX FRIEDRICH GUTERMUTH, or DARMSTADT, GERMANY.

e'LAeK on FLAP VALVE.

Specification 61 Letters Patent.

Patented Feb. 15, 1910.

Application filed September 127, 1907. Serial No. 394,892.

ments in Clack or Flap Valves, of which the following is a specification. A

Claekor flap val'es, whih consist 'of a fiat closing plate with spring coils connected therewith in spite of their great advantages frequently have the drawback, more particularly in the ease of very broad flaps, that the opening movement, especiall in rapid workin does not take place uni orinly over the entire width, but that oscillations and vibrations arise, i In order to avoi'd this drawback, the obeetof the present invention is to stiffen and guide the spring coils by suitable means. For this object the coils, with the exception of the first which is directly connected to the flat plate, are made shorter than the actual seat plate, and in the free spaces thereby formed at both ends, guide rings are fixed on the spindle on which the innermost coil is mounted. As these guide rings are also wholly or partially inclosed by the first broad coil, in the opening movement a suitable guidance for the flap is obtained by this means, so that, more particularly in the case of very wide flaps, oscillations and vibrations, facilitated by the easily movable spring coils, are avoided. By the shortening of the spring coils, the advantage is also obtained that the spring resistance and consequently the resistance of the flap (to the passage of the fluid) is diminished, so that it is possible to select thicker plates and nevertheless by a suitable diminution of the length of the coil to reduce the strength of the spring to the desired degree.

The improved clack or flap valve is shown in one form of construction in the accompanying drawings, in which:-

Figure 1 is a section on the line A-A, and- Fig. 2 a section on the line B-B of Fig. 3, Fig. 3 is a plan view of the valve, Fig. 4 shows a development or projection of the plate, and Fig. 5 is a plan View of a plate having simple circular perforations instead of elongated ones.

The first spring coil 6, as shown more particularly in the section on the line B, B, is connected along its full length with the flat closing plate a. The succeeding'coils c on I the other-hand 'are made considerably shorter than the entire width oft-he flap, so that free spaces areformed on both sides of the flap. In these-"free spaces two guide rings a are then passedlfrom the'side on to the spindle (Z which carries the' innermost spring coil which is seeuredto the spindle. These guide rings entirely-fill the said free spaces in such a -way that internally they encounter the spring coils, but: externally do not project beyond the width ofthe flap. Now as the first coil 6, as may be-s'een in the drawings. wholly or in any case partially in'closes both guide rings 0, the guide rings prevent the valve flap being lifted unevenly in the opening movement, and any fluttering, vibrating and oscillating of the flap such as may take place in consequence of the flexibility of the spring coils, more particularly in the ease. of very wide flaps, is avoided. At the same time, as already mentioned, by the shortening of the spring coils, the spring resistance of the valve and therefore the resistance to the passage of the fluid, is reduced. Consequently the thickness of the plate a may be made greater than hitherto and the same thicknessof late may also be used for the coil part, whlle by this invention the length of the coil may be'so far diminished that the spring pressure is reduced to thedesired tent. On the other hand, the coils must not. be shortened too much in order that in the case of large sized flaps the uniform action of the spring pressure over the entire widthof the flap shall not be affected. Now in order in spite of that todiminish the resistance of the spring to the necessary extent in the case of thicker plateis,.the coilpart of the plate may be provided with notches, per- 'forations and the like.

Fig. 4 shows a developed plate, .the reduced coil part 0 being provided with elongated slots, f, while in Fig. 5 the elongated slots are replaced by simple perforations g which may be arranged in closeproximity to one another. In this way it is possible to make the valve plate of the full thickness of metal, so that it is no longer necessary to form the coils of thinner plate than the fiat plate operating the closing of the valve.

I declare that what I claim is 2- 1. In a flap valve, a" spindle, a sprin about said spindle, a valve integral wit said spring, said valve being of greater width than the part of said spring secured to said spindle and a guide ring on said spindle on each side of said spring and abutting against the end of the spring.

2. In a flap valve, a spindle, a piece of sheet metal secured to and wound about said spindle, guide rings on said spindle on each side of the wound part of said sheet metal attached to said spindle, a part of said sheet metal of greater width than the part of said sheet metal secured to said spindle, a portion of said wide part being arranged about said guide rings, the outer end of said sheet metal forming a valve proper.

3. In a fla valve, a spindle, guide rings on said spin le, a piece ofsheet metal havinga narrower and a broader portion, said narrower portion being secured to and wound about said spindle between said guide rings, a portion of the wider part of said sheet metal piece bein also wound about said spindle, but over apping said guide rings, the outer end of the wide portion of said sheet metal piece forming the valve proper.

4. In a fla valve, a. spindle, guide rings on said spin le, a piece of sheet metal having a narrower and a broader portion, said narrower portion being. perforated and secured to and Wound about said spindle between said guide rings, a. portion of the to and. Wound about said spindle: between said uide rings, a portion of the wider. part of 831d sheet metal piece being also wound about said spindle but overlapping said guide rings,-the outer end of the wide portion of. said sheet metal. piece forming the valve proper. I

In witness-whereof I have hereunto set my hand in presence of two witnesses.

MAX FRIEDRICH GUTERMUTH; Witnesses: f.

HENRY HASPER, WOLDEMAR HAUPT. .7 

